Here are some of the items Phil Libin added to his account in October. Evernote (read the Inc. magazine feature on Company of the Year Evernote here) can store audio memos, webpages, e-mails, documents, and photos. Libin uses it to keep a log of meetings, company metrics, and online articles. He even takes photos of his meals when he travels, so he can remember what he ate.

Web Clippings By downloading a browser add-on, you can save webpages—like this snippet about a camera that caught Libin's eye—with a single click. Evernote archives text and images.

Digital Bread Crumbs You can add labels and tags to make items easier to find in a search. Evernote automatically tracks when the note was created and where you were when you created it. You can also organize items into notebooks.

It's Everywhere Evernote has apps for PC, Mac, iPad, and nearly every kind of smartphone. There's also a Web-based application. You can even store information by forwarding e-mails to Evernote.

Searchable Scribbles Evernote reads and catalogs visible text in photos, including handwritten notes (provided you have decent penmanship). If you upload a photo of a whiteboard to Evernote, you can find the file again later by doing a search for one of the words on the board.

An Affair to Remember

Many Evernote users, especially those in the tech industry, have become fanatics. Here are three of them.

Loic Le MeurFounder of Seesmic, a San Francisco–based maker of social-media-management software

How I use itTo save lunch receipts (which I share with my accountant), business cards, meeting notes, and memos I speak into my iPhone

Favorite trickWhen I'm handed a business card, I immediately take a photo of it with my phone to put it in Evernote. Then, just for fun, I hand the card back, unless it would be impolite.

How it has come in handyBoth my mobile phones are perfectly synchronized with all my latest information through Evernote. I have no paper in my life at all now.

Adelle CharlesCo-founder of Tinder, a San Francisco–based company that makes online publishing tools. She also co-founded Carbon Ads, an online advertising network.

How I use itTo keep track of honeymoon ideas, recipes, notes, e-mails, and shopping lists

Favorite trickI treat Evernote as my other e-mail inbox. Everything that doesn't require an immediate response goes there, so I can follow up later and keep my inbox clean.

How it has come in handyI needed to match a paint color in my home, so I searched Evernote and found a picture I had taken of the paint can.

Guy KawasakiAuthor and co-founder of Alltop, an online news aggregator based in Palo Alto, California

How I use itTo keep track of passwords, travel itineraries, receipts, contracts, business cards, and webpage snippets for book research

How it has come in handySeveral months ago, I flew to Los Angeles to do a commercial. In order to get reimbursed, I had to provide a copy of the receipt. But I bought the ticket at the airport, and the paper receipt was long gone. Thankfully, I had scanned it into Evernote.